Answered by:

Schannel Event ID 36887 The following fatal alert was received: 46.

Question

We are seeing this error in our web server farm. Best we can tell is that error 46 corresponds to an unknown certificate error. Is there any way to debug these types of errors or better yet does anyone know the cause? The servers are running
IIS 7.5 and are Windows 2008 R2.

We are getting the same error on our Windows 2008 64 bit Exchange 2010 server.

We use outlook anywhere and web browser supported email.

One thing we noticed is that Mozilla firefox browser if used to go into web mail creates this event error.

the more people that use Firefox the more frequent the errors occur.
I have sent instructions to all my mail users to not use firefox but I still get this error just not as often.
One other thing to note. outlook the program has trouble sending messages. the outbox in outlook never empty's messages just hang and never get sent.

If you find out more about this or some other things that may cause this error please share it with me.

Microsoft is conducting an online survey to understand your opinion of the Technet Web site. If you choose to participate, the online survey will be presented to you when you leave the Technet Web site.